MD Bookmarks: Handle bookmark creation

chrome/test/data/webui/md_bookmarks/reducers_test.js

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 suite('selection state', function() {
   var state;
   var action;
 
   function select(items, anchor, add) {
     return {
@@ skipping 205 matching lines @@
     assertEquals(undefined, state['4'].url);
 
     // Cannot edit URL of a folder:
     action = bookmarks.actions.editBookmark('4', {url: 'folder.com'});
     state = bookmarks.NodeState.updateNodes(state, action);
 
     assertEquals('folder', state['4'].title);
     assertEquals(undefined, state['4'].url);
   });
 
+  test('updates when a node is created', function() {
+    // Create a folder.
+    var folder = {
+      id: '6',
+      parentId: '1',
+      index: 2,
+    };
+    action = bookmarks.actions.createBookmark(folder.id, folder);
+    state = bookmarks.NodeState.updateNodes(state, action);
+
+    assertEquals('1', state['6'].parentId);
+    assertDeepEquals([], state['6'].children);
+    assertDeepEquals(['2', '3', '6', '4'], state['1'].children);
+
+    // Add a new item to that folder.
+    var item = {
+      id: '7',
+      parentId: '6',
+      index: 0,
+      url: 'https://www.example.com',
+    };
+
+    action = bookmarks.actions.createBookmark(item.id, item);
+    state = bookmarks.NodeState.updateNodes(state, action);
+
+    assertEquals('6', state['7'].parentId);
+    assertEquals(undefined, state['7'].children);
+    assertDeepEquals(['7'], state['6'].children);
+  });
+
   test('updates when a node is deleted', function() {
     action = bookmarks.actions.removeBookmark('3', '1', 1);
     state = bookmarks.NodeState.updateNodes(state, action);
 
     assertDeepEquals(['2', '4'], state['1'].children);
 
     // TODO(tsergeant): Deleted nodes should be removed from the nodes map
     // entirely.
   });
 
@@ skipping 72 matching lines @@
     // Case 2: Clear search by selecting a new folder.
     action = bookmarks.actions.selectFolder('2');
     var selectedState = bookmarks.reduceAction(searchedState, action);
 
     assertEquals('2', selectedState.selectedFolder);
     assertDeepEquals(['3'], bookmarks.util.getDisplayedList(selectedState));
     assertEquals('', selectedState.search.term);
     assertDeepEquals([], selectedState.search.results);
   });
 });